Rod coupling



.Pented I4, i

enr-ENT OFFICE i non comme pesarese sied mms is, ieri. senin. ne. stesse.

he used for any other purposes :tor which it is adapted.

The nature and objects of the invention,

will he understood from the following description of thereof, reference being mede throuehout the description to the :iccornpenying rew-- ing wherein:

le igure l is e longitudinal section showing the parts at one Stege of assembly; l

.Figure 2 is a similar section showing the ports in nal assembled condition; and

Figure 3 is e transverse section on the line 5?-3 ci Fig. 2.

The sleeve connects the hardened workportion of the mendrel A with the teil portion of the mandrel B. The ports connected may obviously he other then niendrel perte. L ire msndrel perte are provided with i rennd threeded portions 11e, llt leaving unf its, llt ere enough smaller than t threeded portions l2, 12b on the ends adjethe large stock. The threaded ortions he lerge to receive the sleeve l0 so that its outer shrines is about even with the outer surinces y the mondi-el parte. The sleeve has threaded portions 13a, end engaging the threaded portions lio, 11b oi the mandrel-perte.

Cantrell the sleeve is provided with en annular e utment 14 mailer in interior diameter then the outside diameter of the threaded portions 11a, 116 of the mandrel arts in order that the abutment faces 14a 4b of the abutment may come against the sto and; of the threaded portions of the mandrel. parts. Y

ere are unthreaded portions 16a,

to use in this copsci-4 en exemplary embodiment' 13b corresponding to.

faces 15a, 15b at the adjacent or inner-V the coupling;f prevents the strippingf 16h provided et either endoi the ehutment le;

Beyond the threaded portions 11a, 116 the niendrel ports are provided with semifcylindricel or otherwise shaped splines 17a, 17??, the outer end feces 18a, 186 of which shut the notched feces 19a, 196 et the endsof the threaded portions when the arts are fully assembled. rlhe' diemetrel aces 20a, 206 of the splines 17a, 17h may be slightly beveled et` their ends 215 vto assist the assembling of the parte.

Preference merits 22h22() may be initiierenr the large stock where the plane. of the diem- .etrel feces 20a, 20h cuts the circumference thereof to assist in getting the parts in meting position.- lhey cannot he observed when Within the sleev 'lo assemble the perts, Athe sleeve l@ is screwed onto one of the lla or Mh, eey lla, of the port A, until the es indicated by 211% threaded portions end fece 18o of the splined portion is elmost vet the mid-point of the length of the sleeve.

The threaded portion 1lb of the other port B is then threaded in the sleeve for the seme distance. The merits 22e end'22b ere sli ed with esch other to insure movement o the s lines Ma, pest each other. The parts end B ere then gripped while the sleeve l0 is screwed up until tight, the threads st each end being right and left hand respectively ltor this purpose. `l/Vhen the parts are fully esse'rnhled the stop faces 15a, 15b' are tight against the abutment feces 14a, 14?; of the abutment M and the end feces 18a, 186 of the splines are substantially ti ht against the 'notched faces 19a, 196.

here is o' `slight space left between the' ends of the procecan be continuance of the threads at the center of threads .to the parte 'por the loc g of them together as often occurs where the right and left hand threads run together at the center of the sleeve.

While one embodiment of the invention 5 has been described in detail for illustration,.

it is tobe understood that the invention is not'to be limited except by the prior art and the' scope of the subjoined claims. What I claim is.:

1. A rod coupling comprising in combination, rod parts A and B to be coupled2 a sleeve 10 of ap roximatel),1 the same outside diameter as said rod parts` for coupling the same, reduced oppositely threaded portions 1:5 11a, 11b on the rod parts ending in unthreaded portions 12a, 12b adjacent the large portion of the rod parts, mating splined portions 17 a, 1712 without threads and of less diameter than the threaded yportions at the 20 inner ends of the rod parts leaving abutment faces 15a, 151) at the I inner ends of the threaded portions, oppositely threadedportions 13a, 13b at each end of said sleeve ending-in unthreaded portions 16a, 1Gb, anvinlternal annular abutment rib 14 of less internal diameter than the threaded ortions yof the sleeve located between the unt readed portions of the sleeve, and faces 14a, 141) on the abutment rib cooperatingwth the 3o faces 15a, 15b on said'rod parts to lock the parts together when assembled.

2.. A rod-coupling com rising in combination, o positely threade rod parts havin 1 reduce complementary Unthreaded splinv 85 portions atitheir inner ends and Bat annular abutment faces disposed in planes normal to the axis, and a sleeve vhavlng oppositely threaded end portions and an internal annular. abutment rib of less internal diameter 40 than the threaded portions said rib being provided with fiat annular abutment faces disposed in planes normal to the axis for co. operating with the faces of the rod parts to lock the parts ltogether when assembled.

4:5 In testimony whereof, I have signed my name to this specication this 13th day of March, 1931.

, GEORGE B. COE. 

